can anyone help?

Consider the following information about three stocks: a-1. If your portfolio is invested 40 percent each in A and B and 20 percent in C. what is the portfolio expected return? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) a- What is the variance? (Do not round intermediote calculations and round 2. your answer to 5 decimal places, e.g., 16161.) a. What is the standard deviation? (Do not round intermediate calculations and enter 3. your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. If the expected T-bill rate is 3.70 percent, what is the expected risk premium on the portfolio? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) c-1. If the expected inflation rate is 3.30 percent, what are the approximate and exact expected real returns on the portfolio? (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) c- What are the approximate and exact expected real risk premiums on the portfolio? 2. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) Answer is complete but not entirely correct. \begin{tabular}{|l|r|r|} \hline a-1. Portfolio expected return & 11.010 & % \\ \hline a-2. Variance & 0.00079 & \\ \hline a-3. Standard deviation & 2.81 & % \\ \hline b. Expocted tisk premium & 7.31% & % \\ \hline c-1. Approximate expected real return & 7.710 & % \\ \hline c-1. Exact expocted real roturn & 7.46 & % \\ \hline c-2. Approximate expected real risk premium & 4.01 & % \\ \hline c-2. Exact expected real risk premium & 7.08 & % \\ \hline \end{tabular}